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raid: add function for name creation

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Add name for construction and validation of raid subvolume
name with a given suffix.

TODO: check if reusable for mirrors as well.
This commit is contained in:
Zdenek Kabelac 2014-09-12 11:30:00 +02:00
parent 40b7b107b1
commit 2db0312455
1 changed files with 29 additions and 0 deletions
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29
lib/metadata/raid_manip.c
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@ -320,6 +320,35 @@ static int _shift_and_rename_image_components(struct lv_segment *seg)
return 1;
}
/* Generate raid subvolume name and validate it */
static char *_generate_raid_name(struct logical_volume *lv,
const char *suffix, int count)
{
const char *format = (count >= 0) ? "%s_%s_%u" : "%s_%s";
size_t len = strlen(lv->name) + strlen(suffix) + ((count >= 0) ? 5 : 2);
char *name;
if (!(name = dm_pool_alloc(lv->vg->vgmem, len))) {
log_error("Failed to allocate new name.");
return NULL;
}
if (dm_snprintf(name, len, format, lv->name, suffix, count) < 0)
return_NULL;
if (!validate_name(name)) {
log_error("New logical volume name \"%s\" is not valid.", name);
return NULL;
}
if (find_lv_in_vg(lv->vg, name)) {
log_error("Logical volume %s already exists in volume group %s.",
name, lv->vg->name);
return NULL;
}
return name;
}
/*
* Create an LV of specified type. Set visible after creation.
* This function does not make metadata changes.